High or low water alarm.



PATENT-ED DEC. 1, 1903.

R. G. BLAKE. HIGH 0R Low W'ATAR ALARM.

APPLICATION FILED SEPT. 20, 1902'.

lOv MODEL.

. Wa'rz/s ses @MM y? WW UNITED STATES Patented December 1, 1903 vRICHARD C. BLAKE, OF CINCINNATI, OHIO.

HleH 0R Low WATER ALARM.

SPECIFICATION forming part 0f Letters Patent No. 745,317',

dated December 1,1903.

Application iiled September 29. 1902. Serial No. 125,190. (No model.)

To all whom Be it known it may concern:

that I, RICHARD C. BLAKE, a

citizen ofthe United States of America, and a resident ot' Cincinnati,county of Hamilton, State of Ohio, have invented certain new and usefulImprovements in IIigh and Low Vater Alarms, of which the following is aspecification.

The object of my invention is to simplify the construction of alarms forindicating that the water in the boiler has reached either the high orlow water limit.

In the accompanying ,drawings I have illustrated awater-alarm embodyinginyinvention.

Figure l shows a boiler in longitudinal section with a water-columnattached to the end thereof, being shown partly in section and partly inelevation to expose the float which actuates the valve of mywater-alarm, which is shown secured to the column in elevation, theindex-hand secured to the end of the valvestem being shown broken off.Fig. 2 is a view of the alarm embodying my invention similar to Fig. l,but upon an enlarged scale and showing the indicator in elevation. Fig.3 is a top plan view of the alarm embodying my invention upon anenlarged scale. Fig. 4 is a vertical sectional view of the same, takenupon line .fr m, Fig. 3. Fig. 5 is a sectional view taken upon line y y,Fig. 4. Fig. 6 is a sectional view taken upon line o o, Fig. 4.

Referring to the parts, a column A is secured to the boiler A so thatthe central point of the column comes at the true water-line of theboiler, which is indicated in Fig. l by a line marked O. Column A has atits lower end a pipe d, which puts it in communication With the water inthe boiler, and at its upper end a pipe a, which puts it incommunication With the steam in the boiler. Secured to the column A attrue water-line is a valve-casin g B, which has a vertical channel l),which communicates. through pipe b", leading into the lower end of thechannel, with the steam in the upper part of the boiler; Seated inchannel b is a horizontal plug-valve C, whose stem c projects intocolumn A at true water-line and has secured upon its end a rod d, whichat its outer end receives a Iioat D. When the float D is moved bytheWater rising or falling, it rotates plug C, whose lap and lead are madeof a size such that when the Water reaches either high-water line, whichis indicated by line l, Fig. l, or low-water line, which is indicated byline 2, Fig. 1, the channel b will be opened to allow the steam to passup to Whistle E, which is seated upon the valvecasing in communicationwith thev upper end ofthe channel b. 'To give the proper amount of lapand lead, I prefer to cut a groove c in the plug-valve, which extendsaround the lower side of the valve upward, leaving the upper side ofthevalve intact upon each side of the channel for a distance equal to thenumber of degrees through which the arm cl travels in going either fromtrue water-line to high or to 'low water line, so that when the Iioat D-is carried to either high or .low water line the valve C is rotated, sothat groove c puts the upper end of channel h into communication withthe lower end thereof, and thereby opens the communication between thewhistle and the steam in the boiler.

Valve-stem c has an extension c', which extends through the outer sideof the valvecasing B and upon its outer end receives an index-hand F,the outer end of which is over a graduated plate F. When float D is attrue water-line the index-han d F points to O upon the graduated plateF', and as the iioat descends or rises the index-hand does likewise, thegraduations upon the plate being spaced so thatthenumber of inches thefloat is away from true water-line is indicatedby the index-hand F uponthe graduated plate. Valve-casing B has likewise a drain-cock Gr, seatedin a channel g, extending from channel b up into chamber b2, whichsurrounds valve-stem c. Cock G has grooves g g2 upon opposite sides, sothat by turning the .handle g3 of the cock` in one direction channel?)is put into communication with the drain-port g4, and by turning it inthe other direction chamber b2 is put into communication with thedrain-port. Y

Drain-cock Gis made in the form of a plugvalve tapering and held to itsseat by a coiled spring g5. I have not claimed this specic form of valveherein, since the same is made the subject of a separate application.

With a water-alarm of my construction the valve-stem of the valve, whichopens communication between the signal and the the plug-valve C steam inthe boiler, extending', as it does, into the column at true water-line,it is seen that the Valve rotates through the same angle that the iioatpasses through in rising or falling with the water in the column, andtherefore the exact time when the channel b would be opened by the valvecan be regulated to the iinest degree of accuracy by changing the amountoi' lap and lead to the valve. rlhe simplicity of my construction overthose in the art is readily appreciated when it is taken intoconsideration that the valve which regulates the opening of stealn tothe signal is connected directly to the rod of the Heat. The indicator,which is used for informing the engineer at what point the Water in theboiler is before the sounding ofthe signal is likewise added to my alarmwith only two additional parts-1iamely, the indicator-hand and thegraduated plate. The simplicity of this construction is apparent.

l. A valve-casing secured to a boiler, a steam-channel extending throughthe casing, a rotating valve within the casing seated in thesteam-channel whose valve-stem extends into the boiler, a signalingdevice at one end of the channel, a rod secured to the end of thevalve-ste1n,a iioat secured upon the outer end of the rod, and a pipefor placing the steamchannel in communication with the steam in theboiler substantially as shown and described. j

2. A valve-casing secured to a boiler, a steam-channel extending throughthe casing, a rotating valve Within the casing seated in thesteam-channel whose valve-stem extends into the boiler, a signalingdevice at one end of the channel, a rod secured to the inner end of thevalve-stem, a ioat secured upon the outer end of the rod, an extensionupon the valve-stem projecting through the casing, an index-hand securedupon the end of the extension, and a pipe for placing the steamchannelin communication with the steam in the boiler substantially as shown anddescribed.

3. A column secured to a boiler and communicating with the water and thesteam thereof,.a casing secured to the column, a steam-channel extendingthrough the casing, a rotating valve within the casin g whose valvestemextends into the column, a signaling device at one end of the channel, arod secured to the inner end of the valve-stem, a iioat secured upon theouter end of the rod and a pipe for placing the steam-channel incommunication with the steam in the boiler substantially as shown anddescribed.

4. The combination of a valve-casing secured to a boiler at truewater-line, a steamchannel extending' through the casing, a signalin gdevice at one end of the steam-channel, a pipe leading from the steam inthe boiler into the other end of the channel, a rotating valve betweenthe signaling device and the pipe and having a stem extending into theboiler at true water-line, a rod secured to the end of the valve-stemand a float upon the rod, whereby when the water in the boiler reaches apredetermined limit the valve puts the signal in communication with thesteam substantially as shown and described.

5. The combination of a water-column secured to a boiler andcommunicating with the water and the steam therein, a valve casingsecured to the water-column at true waterline a steam-channel extendingthrough .the easing, a signaling device at one end of the steam-channel,a pipe leading from the steam in the boiler into the other end oi' thechannel, a plug-valve seated in the easing across the channel betweenthe signaling device and the pipe and having a valve-stem extending intothe easing at true water-line, a rod secured to the end of thevalve-stem upon the inside of the column, and a iioat upon the rodwhereby when the Water in the boiler reaches a predetermined limit thevalve puts the naling device in communication with the steamsubstantially as shown and described.

(i. The combination of a water-column secured to a boiler andcommunicating with the water and the steam therein, a valve-casingsecured to the water-column at true waterline a steam-channel extendingthrough the casing, a signaling device at one end of the channel, a pipeat the other end of the channel to place it in communication With thesteam in the boiler, a rotating valve in the casing seated in thechannel and having a valve-stem extending into the water-column upon oneside and through the valve-casing upon the other side, an arm securedupon the end of the valve-stem upon the interior'of the column, a Heatupon the rod, an index-hand upon the end of the valve-stem upon theoutside of the casing, and an indicator-plate secured to the columnadjacent to the indicatorhand substantially as shown and described.

RICHARD C. BLAKE.

XVitncsses:

M. J. SCANLAN, W. F. MURRAY.

IOC

